628 TAdK sKOtisrtRnr. 



pointing backward wlu-n in a position of rest; it is witliovit any accessory saccules. The 

 c-bristle is straight and rather short, alxmt as long as th(< proximal liciglit of the second joint. 

 All the joints are ipiite hare. In the lirst joint there are often some yellowish-brown corpuscles. 



S e c o n d antenna: - 1' r o t o p o d i t e: In specimens whose shells were about 

 •J. -J mm. long this measured about l.o l.l iniii. \\ x o p o d i t c: 'I'lic proportion between the 

 length of this branch and ihat nt the iJrotojnidite is about 1 -.'J. Ttic proportion between the 

 length of the lirst joint and the total length of the eiglit following joints is about 2 : 1. The 

 proportion between the length of the longest natatory bristles and that of the exopodite is about 

 7 : 4. The first joint, at least as far as I could observe with Khichkiit's ocular 4 and Lhitz's 

 immersion Vis, is quite smooth. K n d o p o d i t e (figs. 6 and 7): First joint: The processus 

 raammillaris has in most cases a small verruciform distal process. The a- and b-bristles most 

 frequently have short hairs at the middle and are bare distally. Second joint: The c- and 

 d-bristles are in most cases somewhat shorter than this joint and have short, fine hairs or are 

 almost quite bare. The e-bristle is extremely short. The f-bristle is about one and a half times 

 the length of the protopodite. sometimes even somewhat longer; it grows gradually narrower 

 distallv and is bare. The g-binstle is, contrary to what is the case in most of the other species 

 of this genus, shorter than the f-bristle; it attains only about a half or two-thirds of the latter's 

 length; it is not at all or only slightly widened distally and is furnished in most cases with short 

 hairs. The f- and g-bristles have no proximal swellings. Third joint: The clasping organs are 

 of about the types reproduced by G. W. MUller, 1906 a, pi. XIII, figs. 21 and 22. The h-, 

 i- and j-bristles are subequal, about a third or a quarter of the length of the f-bristle; along the 

 greater part of their length they are about as broad as the proximal part of the g-bristle; they 

 are not widened proximally and have only rather slightly developed shafts; they are bare. 

 There are sometimes some small yellow corpuscles in the protopodite and the endopodite. 



Mandible: — Protopodite: Coxale: The toothed edge on the pars incisiva 

 has from about ten to twelve teeth. The distal tooth-list is of about the same relative size and 

 type as has been described for C. oblonga above; the number of teeth varies somewhat, from 

 about twenty to thirty were observed. The proximal tooth-list is rather slightly narrower than 

 the distal one; there are a somewhat varying number (about fourteen to twenty) of teeth, in most 

 cases smooth and conical, arranged more or less distinctly in a simple row; the posterior ones 

 of these are rather large and powerful, the others decrease either (as in the accompanying fig. 10) 

 rather imiformly in size and strength the more anteriorly they are situated, the anterior ones 

 being rather small and weak, or else this decrease in length and strength is rather irregular. 

 This tooth-list is furnished on the inside with numerous short, fine spines, situated close together. 

 The masticatory pad is of about the same relative size and type as has been described above 

 for C. oblonga. The part of the pars incisiva that is surrounded by the row of bristles also shows 

 signs of being developed as a masticatory pad. The lancet-bristles are, as C. Claus pointed 

 out, 1891 a, p. 63 ,,zur Seite gedrangt, in dem dichten Borstensaum mehr oder minder versteckt". 

 Basale: The six teeth on the distal edge of the endite are furnished with rather fine serrate teeth. 

 The single tooth on the outside of this process is of about the same type and size as in my 

 fig. 19 of C. symmetrica; in most cases it is moderately strongly serrulated along the greater 



